4 * Copyright (C) International Business Machines Corp., 2002,2008
7 * Common Internet FileSystem (CIFS) client
9 * This library is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU Lesser General Public License as published
11 * by the Free Software Foundation; either version 2.1 of the License, or
12 * (at your option) any later version.
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
17 * the GNU Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public License
20 * along with this library; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 /* Note that BB means BUGBUG (ie something to fix eventually) */
26 #include <linux/module.h>
28 #include <linux/mount.h>
29 #include <linux/slab.h>
30 #include <linux/init.h>
31 #include <linux/list.h>
32 #include <linux/seq_file.h>
33 #include <linux/vfs.h>
34 #include <linux/mempool.h>
35 #include <linux/delay.h>
36 #include <linux/kthread.h>
37 #include <linux/freezer.h>
38 #include <linux/namei.h>
39 #include <linux/random.h>
40 #include <linux/uuid.h>
41 #include <linux/xattr.h>
45 #define DECLARE_GLOBALS_HERE
47 #include "cifsproto.h"
48 #include "cifs_debug.h"
49 #include "cifs_fs_sb.h"
51 #include <linux/key-type.h>
52 #include "cifs_spnego.h"
55 #ifdef CONFIG_CIFS_DFS_UPCALL
56 #include "dfs_cache.h"
61 bool enable_oplocks = true;
62 bool linuxExtEnabled = true;
63 bool lookupCacheEnabled = true;
64 bool disable_legacy_dialects; /* false by default */
65 unsigned int global_secflags = CIFSSEC_DEF;
66 /* unsigned int ntlmv2_support = 0; */
67 unsigned int sign_CIFS_PDUs = 1;
68 static const struct super_operations cifs_super_ops;
69 unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE;
70 module_param(CIFSMaxBufSize, uint, 0444);
71 MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header) "
73 "Default: 16384 Range: 8192 to 130048");
74 unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL;
75 module_param(cifs_min_rcv, uint, 0444);
76 MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: "
78 unsigned int cifs_min_small = 30;
79 module_param(cifs_min_small, uint, 0444);
80 MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 "
82 unsigned int cifs_max_pending = CIFS_MAX_REQ;
83 module_param(cifs_max_pending, uint, 0444);
84 MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server for "
85 "CIFS/SMB1 dialect (N/A for SMB3) "
86 "Default: 32767 Range: 2 to 32767.");
87 #ifdef CONFIG_CIFS_STATS2
88 unsigned int slow_rsp_threshold = 1;
89 module_param(slow_rsp_threshold, uint, 0644);
90 MODULE_PARM_DESC(slow_rsp_threshold, "Amount of time (in seconds) to wait "
91 "before logging that a response is delayed. "
92 "Default: 1 (if set to 0 disables msg).");
95 module_param(enable_oplocks, bool, 0644);
96 MODULE_PARM_DESC(enable_oplocks, "Enable or disable oplocks. Default: y/Y/1");
98 module_param(disable_legacy_dialects, bool, 0644);
99 MODULE_PARM_DESC(disable_legacy_dialects, "To improve security it may be "
100 "helpful to restrict the ability to "
101 "override the default dialects (SMB2.1, "
102 "SMB3 and SMB3.02) on mount with old "
103 "dialects (CIFS/SMB1 and SMB2) since "
104 "vers=1.0 (CIFS/SMB1) and vers=2.0 are weaker"
105 " and less secure. Default: n/N/0");
107 extern mempool_t *cifs_sm_req_poolp;
108 extern mempool_t *cifs_req_poolp;
109 extern mempool_t *cifs_mid_poolp;
111 struct workqueue_struct *cifsiod_wq;
112 struct workqueue_struct *cifsoplockd_wq;
113 __u32 cifs_lock_secret;
116 * Bumps refcount for cifs super block.
117 * Note that it should be only called if a referece to VFS super block is
118 * already held, e.g. in open-type syscalls context. Otherwise it can race with
119 * atomic_dec_and_test in deactivate_locked_super.
122 cifs_sb_active(struct super_block *sb)
124 struct cifs_sb_info *server = CIFS_SB(sb);
126 if (atomic_inc_return(&server->active) == 1)
127 atomic_inc(&sb->s_active);
131 cifs_sb_deactive(struct super_block *sb)
133 struct cifs_sb_info *server = CIFS_SB(sb);
135 if (atomic_dec_and_test(&server->active))
136 deactivate_super(sb);
140 cifs_read_super(struct super_block *sb)
143 struct cifs_sb_info *cifs_sb;
144 struct cifs_tcon *tcon;
147 cifs_sb = CIFS_SB(sb);
148 tcon = cifs_sb_master_tcon(cifs_sb);
150 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIXACL)
151 sb->s_flags |= SB_POSIXACL;
153 if (tcon->snapshot_time)
154 sb->s_flags |= SB_RDONLY;
156 if (tcon->ses->capabilities & tcon->ses->server->vals->cap_large_files)
157 sb->s_maxbytes = MAX_LFS_FILESIZE;
159 sb->s_maxbytes = MAX_NON_LFS;
161 /* BB FIXME fix time_gran to be larger for LANMAN sessions */
162 sb->s_time_gran = 100;
164 sb->s_magic = CIFS_MAGIC_NUMBER;
165 sb->s_op = &cifs_super_ops;
166 sb->s_xattr = cifs_xattr_handlers;
167 rc = super_setup_bdi(sb);
170 /* tune readahead according to rsize */
171 sb->s_bdi->ra_pages = cifs_sb->rsize / PAGE_SIZE;
173 sb->s_blocksize = CIFS_MAX_MSGSIZE;
174 sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */
175 inode = cifs_root_iget(sb);
183 sb->s_d_op = &cifs_ci_dentry_ops;
185 sb->s_d_op = &cifs_dentry_ops;
187 sb->s_root = d_make_root(inode);
193 #ifdef CONFIG_CIFS_NFSD_EXPORT
194 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
195 cifs_dbg(FYI, "export ops supported\n");
196 sb->s_export_op = &cifs_export_ops;
198 #endif /* CONFIG_CIFS_NFSD_EXPORT */
203 cifs_dbg(VFS, "%s: get root inode failed\n", __func__);
207 static void cifs_kill_sb(struct super_block *sb)
209 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
211 cifs_umount(cifs_sb);
215 cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
217 struct super_block *sb = dentry->d_sb;
218 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
219 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
220 struct TCP_Server_Info *server = tcon->ses->server;
226 if (le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength) > 0)
228 le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength);
230 buf->f_namelen = PATH_MAX;
232 buf->f_fsid.val[0] = tcon->vol_serial_number;
233 /* are using part of create time for more randomness, see man statfs */
234 buf->f_fsid.val[1] = (int)le64_to_cpu(tcon->vol_create_time);
236 buf->f_files = 0; /* undefined */
237 buf->f_ffree = 0; /* unlimited */
239 if (server->ops->queryfs)
240 rc = server->ops->queryfs(xid, tcon, buf);
246 static long cifs_fallocate(struct file *file, int mode, loff_t off, loff_t len)
248 struct cifs_sb_info *cifs_sb = CIFS_FILE_SB(file);
249 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
250 struct TCP_Server_Info *server = tcon->ses->server;
252 if (server->ops->fallocate)
253 return server->ops->fallocate(file, tcon, mode, off, len);
258 static int cifs_permission(struct inode *inode, int mask)
260 struct cifs_sb_info *cifs_sb;
262 cifs_sb = CIFS_SB(inode->i_sb);
264 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) {
265 if ((mask & MAY_EXEC) && !execute_ok(inode))
269 } else /* file mode might have been restricted at mount time
270 on the client (above and beyond ACL on servers) for
271 servers which do not support setting and viewing mode bits,
272 so allowing client to check permissions is useful */
273 return generic_permission(inode, mask);
276 static struct kmem_cache *cifs_inode_cachep;
277 static struct kmem_cache *cifs_req_cachep;
278 static struct kmem_cache *cifs_mid_cachep;
279 static struct kmem_cache *cifs_sm_req_cachep;
280 mempool_t *cifs_sm_req_poolp;
281 mempool_t *cifs_req_poolp;
282 mempool_t *cifs_mid_poolp;
284 static struct inode *
285 cifs_alloc_inode(struct super_block *sb)
287 struct cifsInodeInfo *cifs_inode;
288 cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL);
291 cifs_inode->cifsAttrs = 0x20; /* default */
292 cifs_inode->time = 0;
294 * Until the file is open and we have gotten oplock info back from the
295 * server, can not assume caching of file data or metadata.
297 cifs_set_oplock_level(cifs_inode, 0);
298 cifs_inode->flags = 0;
299 spin_lock_init(&cifs_inode->writers_lock);
300 cifs_inode->writers = 0;
301 cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
302 cifs_inode->server_eof = 0;
303 cifs_inode->uniqueid = 0;
304 cifs_inode->createtime = 0;
305 cifs_inode->epoch = 0;
306 generate_random_uuid(cifs_inode->lease_key);
309 * Can not set i_flags here - they get immediately overwritten to zero
312 /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME; */
313 INIT_LIST_HEAD(&cifs_inode->openFileList);
314 INIT_LIST_HEAD(&cifs_inode->llist);
315 return &cifs_inode->vfs_inode;
318 static void cifs_i_callback(struct rcu_head *head)
320 struct inode *inode = container_of(head, struct inode, i_rcu);
321 kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
325 cifs_destroy_inode(struct inode *inode)
327 call_rcu(&inode->i_rcu, cifs_i_callback);
331 cifs_evict_inode(struct inode *inode)
333 truncate_inode_pages_final(&inode->i_data);
335 cifs_fscache_release_inode_cookie(inode);
339 cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
341 struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr;
342 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr;
344 seq_puts(s, ",addr=");
346 switch (server->dstaddr.ss_family) {
348 seq_printf(s, "%pI4", &sa->sin_addr.s_addr);
351 seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr);
352 if (sa6->sin6_scope_id)
353 seq_printf(s, "%%%u", sa6->sin6_scope_id);
356 seq_puts(s, "(unknown)");
359 seq_puts(s, ",rdma");
363 cifs_show_security(struct seq_file *s, struct cifs_ses *ses)
365 if (ses->sectype == Unspecified) {
366 if (ses->user_name == NULL)
367 seq_puts(s, ",sec=none");
371 seq_puts(s, ",sec=");
373 switch (ses->sectype) {
375 seq_puts(s, "lanman");
378 seq_puts(s, "ntlmv2");
387 seq_puts(s, "ntlmssp");
390 /* shouldn't ever happen */
391 seq_puts(s, "unknown");
400 cifs_show_cache_flavor(struct seq_file *s, struct cifs_sb_info *cifs_sb)
402 seq_puts(s, ",cache=");
404 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO)
405 seq_puts(s, "strict");
406 else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
409 seq_puts(s, "loose");
413 cifs_show_nls(struct seq_file *s, struct nls_table *cur)
415 struct nls_table *def;
417 /* Display iocharset= option if it's not default charset */
418 def = load_nls_default();
420 seq_printf(s, ",iocharset=%s", cur->charset);
425 * cifs_show_options() is for displaying mount options in /proc/mounts.
426 * Not all settable options are displayed but most of the important
430 cifs_show_options(struct seq_file *s, struct dentry *root)
432 struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb);
433 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
434 struct sockaddr *srcaddr;
435 srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
437 seq_show_option(s, "vers", tcon->ses->server->vals->version_string);
438 cifs_show_security(s, tcon->ses);
439 cifs_show_cache_flavor(s, cifs_sb);
441 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
442 seq_puts(s, ",multiuser");
443 else if (tcon->ses->user_name)
444 seq_show_option(s, "username", tcon->ses->user_name);
446 if (tcon->ses->domainName && tcon->ses->domainName[0] != 0)
447 seq_show_option(s, "domain", tcon->ses->domainName);
449 if (srcaddr->sa_family != AF_UNSPEC) {
450 struct sockaddr_in *saddr4;
451 struct sockaddr_in6 *saddr6;
452 saddr4 = (struct sockaddr_in *)srcaddr;
453 saddr6 = (struct sockaddr_in6 *)srcaddr;
454 if (srcaddr->sa_family == AF_INET6)
455 seq_printf(s, ",srcaddr=%pI6c",
457 else if (srcaddr->sa_family == AF_INET)
458 seq_printf(s, ",srcaddr=%pI4",
459 &saddr4->sin_addr.s_addr);
461 seq_printf(s, ",srcaddr=BAD-AF:%i",
462 (int)(srcaddr->sa_family));
465 seq_printf(s, ",uid=%u",
466 from_kuid_munged(&init_user_ns, cifs_sb->mnt_uid));
467 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
468 seq_puts(s, ",forceuid");
470 seq_puts(s, ",noforceuid");
472 seq_printf(s, ",gid=%u",
473 from_kgid_munged(&init_user_ns, cifs_sb->mnt_gid));
474 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
475 seq_puts(s, ",forcegid");
477 seq_puts(s, ",noforcegid");
479 cifs_show_address(s, tcon->ses->server);
482 seq_printf(s, ",file_mode=0%ho,dir_mode=0%ho",
483 cifs_sb->mnt_file_mode,
484 cifs_sb->mnt_dir_mode);
486 cifs_show_nls(s, cifs_sb->local_nls);
489 seq_puts(s, ",seal");
491 seq_puts(s, ",nocase");
493 seq_puts(s, ",hard");
495 seq_puts(s, ",soft");
496 if (tcon->use_persistent)
497 seq_puts(s, ",persistenthandles");
498 else if (tcon->use_resilient)
499 seq_puts(s, ",resilienthandles");
500 if (tcon->posix_extensions)
501 seq_puts(s, ",posix");
502 else if (tcon->unix_ext)
503 seq_puts(s, ",unix");
505 seq_puts(s, ",nounix");
506 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS)
507 seq_puts(s, ",nodfs");
508 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
509 seq_puts(s, ",posixpaths");
510 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
511 seq_puts(s, ",setuids");
512 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UID_FROM_ACL)
513 seq_puts(s, ",idsfromsid");
514 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
515 seq_puts(s, ",serverino");
516 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD)
517 seq_puts(s, ",rwpidforward");
518 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL)
519 seq_puts(s, ",forcemand");
520 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
521 seq_puts(s, ",nouser_xattr");
522 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
523 seq_puts(s, ",mapchars");
524 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SFM_CHR)
525 seq_puts(s, ",mapposix");
526 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
528 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
529 seq_puts(s, ",nobrl");
530 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_HANDLE_CACHE)
531 seq_puts(s, ",nohandlecache");
532 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
533 seq_puts(s, ",cifsacl");
534 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
535 seq_puts(s, ",dynperm");
536 if (root->d_sb->s_flags & SB_POSIXACL)
538 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
539 seq_puts(s, ",mfsymlinks");
540 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE)
542 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)
543 seq_puts(s, ",nostrictsync");
544 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
545 seq_puts(s, ",noperm");
546 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPUID)
547 seq_printf(s, ",backupuid=%u",
548 from_kuid_munged(&init_user_ns,
549 cifs_sb->mnt_backupuid));
550 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPGID)
551 seq_printf(s, ",backupgid=%u",
552 from_kgid_munged(&init_user_ns,
553 cifs_sb->mnt_backupgid));
555 seq_printf(s, ",rsize=%u", cifs_sb->rsize);
556 seq_printf(s, ",wsize=%u", cifs_sb->wsize);
557 seq_printf(s, ",echo_interval=%lu",
558 tcon->ses->server->echo_interval / HZ);
559 if (tcon->snapshot_time)
560 seq_printf(s, ",snapshot=%llu", tcon->snapshot_time);
561 /* convert actimeo and display it in seconds */
562 seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ);
567 static void cifs_umount_begin(struct super_block *sb)
569 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
570 struct cifs_tcon *tcon;
575 tcon = cifs_sb_master_tcon(cifs_sb);
577 spin_lock(&cifs_tcp_ses_lock);
578 if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) {
579 /* we have other mounts to same share or we have
580 already tried to force umount this and woken up
581 all waiting network requests, nothing to do */
582 spin_unlock(&cifs_tcp_ses_lock);
584 } else if (tcon->tc_count == 1)
585 tcon->tidStatus = CifsExiting;
586 spin_unlock(&cifs_tcp_ses_lock);
588 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
589 /* cancel_notify_requests(tcon); */
590 if (tcon->ses && tcon->ses->server) {
591 cifs_dbg(FYI, "wake up tasks now - umount begin not complete\n");
592 wake_up_all(&tcon->ses->server->request_q);
593 wake_up_all(&tcon->ses->server->response_q);
594 msleep(1); /* yield */
595 /* we have to kick the requests once more */
596 wake_up_all(&tcon->ses->server->response_q);
603 #ifdef CONFIG_CIFS_STATS2
604 static int cifs_show_stats(struct seq_file *s, struct dentry *root)
611 static int cifs_remount(struct super_block *sb, int *flags, char *data)
614 *flags |= SB_NODIRATIME;
618 static int cifs_drop_inode(struct inode *inode)
620 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
622 /* no serverino => unconditional eviction */
623 return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) ||
624 generic_drop_inode(inode);
627 static const struct super_operations cifs_super_ops = {
628 .statfs = cifs_statfs,
629 .alloc_inode = cifs_alloc_inode,
630 .destroy_inode = cifs_destroy_inode,
631 .drop_inode = cifs_drop_inode,
632 .evict_inode = cifs_evict_inode,
633 /* .delete_inode = cifs_delete_inode, */ /* Do not need above
634 function unless later we add lazy close of inodes or unless the
635 kernel forgets to call us with the same number of releases (closes)
637 .show_options = cifs_show_options,
638 .umount_begin = cifs_umount_begin,
639 .remount_fs = cifs_remount,
640 #ifdef CONFIG_CIFS_STATS2
641 .show_stats = cifs_show_stats,
646 * Get root dentry from superblock according to prefix path mount option.
647 * Return dentry with refcount + 1 on success and NULL otherwise.
649 static struct dentry *
650 cifs_get_root(struct smb_vol *vol, struct super_block *sb)
652 struct dentry *dentry;
653 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
654 char *full_path = NULL;
658 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH)
659 return dget(sb->s_root);
661 full_path = cifs_build_path_to_root(vol, cifs_sb,
662 cifs_sb_master_tcon(cifs_sb), 0);
663 if (full_path == NULL)
664 return ERR_PTR(-ENOMEM);
666 cifs_dbg(FYI, "Get root dentry for %s\n", full_path);
668 sep = CIFS_DIR_SEP(cifs_sb);
669 dentry = dget(sb->s_root);
673 struct inode *dir = d_inode(dentry);
674 struct dentry *child;
678 dentry = ERR_PTR(-ENOENT);
681 if (!S_ISDIR(dir->i_mode)) {
683 dentry = ERR_PTR(-ENOTDIR);
687 /* skip separators */
694 while (*s && *s != sep)
697 child = lookup_one_len_unlocked(p, dentry, s - p);
700 } while (!IS_ERR(dentry));
705 static int cifs_set_super(struct super_block *sb, void *data)
707 struct cifs_mnt_data *mnt_data = data;
708 sb->s_fs_info = mnt_data->cifs_sb;
709 return set_anon_super(sb, NULL);
712 static struct dentry *
713 cifs_smb3_do_mount(struct file_system_type *fs_type,
714 int flags, const char *dev_name, void *data, bool is_smb3)
717 struct super_block *sb;
718 struct cifs_sb_info *cifs_sb;
719 struct smb_vol *volume_info;
720 struct cifs_mnt_data mnt_data;
724 * Prints in Kernel / CIFS log the attempted mount operation
725 * If CIFS_DEBUG && cifs_FYI
728 cifs_dbg(FYI, "Devname: %s flags: %d\n", dev_name, flags);
730 cifs_info("Attempting to mount %s\n", dev_name);
732 volume_info = cifs_get_volume_info((char *)data, dev_name, is_smb3);
733 if (IS_ERR(volume_info))
734 return ERR_CAST(volume_info);
736 cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
737 if (cifs_sb == NULL) {
738 root = ERR_PTR(-ENOMEM);
742 cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL);
743 if (cifs_sb->mountdata == NULL) {
744 root = ERR_PTR(-ENOMEM);
748 rc = cifs_setup_cifs_sb(volume_info, cifs_sb);
754 rc = cifs_mount(cifs_sb, volume_info);
756 if (!(flags & SB_SILENT))
757 cifs_dbg(VFS, "cifs_mount failed w/return code = %d\n",
763 mnt_data.vol = volume_info;
764 mnt_data.cifs_sb = cifs_sb;
765 mnt_data.flags = flags;
767 /* BB should we make this contingent on mount parm? */
768 flags |= SB_NODIRATIME | SB_NOATIME;
770 sb = sget(fs_type, cifs_match_super, cifs_set_super, flags, &mnt_data);
773 cifs_umount(cifs_sb);
778 cifs_dbg(FYI, "Use existing superblock\n");
779 cifs_umount(cifs_sb);
781 rc = cifs_read_super(sb);
787 sb->s_flags |= SB_ACTIVE;
790 root = cifs_get_root(volume_info, sb);
794 cifs_dbg(FYI, "dentry root is: %p\n", root);
798 deactivate_locked_super(sb);
800 cifs_cleanup_volume_info(volume_info);
804 kfree(cifs_sb->prepath);
805 kfree(cifs_sb->mountdata);
808 unload_nls(volume_info->local_nls);
812 static struct dentry *
813 smb3_do_mount(struct file_system_type *fs_type,
814 int flags, const char *dev_name, void *data)
816 return cifs_smb3_do_mount(fs_type, flags, dev_name, data, true);
819 static struct dentry *
820 cifs_do_mount(struct file_system_type *fs_type,
821 int flags, const char *dev_name, void *data)
823 return cifs_smb3_do_mount(fs_type, flags, dev_name, data, false);
827 cifs_loose_read_iter(struct kiocb *iocb, struct iov_iter *iter)
830 struct inode *inode = file_inode(iocb->ki_filp);
832 if (iocb->ki_filp->f_flags & O_DIRECT)
833 return cifs_user_readv(iocb, iter);
835 rc = cifs_revalidate_mapping(inode);
839 return generic_file_read_iter(iocb, iter);
842 static ssize_t cifs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
844 struct inode *inode = file_inode(iocb->ki_filp);
845 struct cifsInodeInfo *cinode = CIFS_I(inode);
849 if (iocb->ki_filp->f_flags & O_DIRECT) {
850 written = cifs_user_writev(iocb, from);
851 if (written > 0 && CIFS_CACHE_READ(cinode)) {
852 cifs_zap_mapping(inode);
854 "Set no oplock for inode=%p after a write operation\n",
861 written = cifs_get_writer(cinode);
865 written = generic_file_write_iter(iocb, from);
867 if (CIFS_CACHE_WRITE(CIFS_I(inode)))
870 rc = filemap_fdatawrite(inode->i_mapping);
872 cifs_dbg(FYI, "cifs_file_write_iter: %d rc on %p inode\n",
876 cifs_put_writer(cinode);
880 static loff_t cifs_llseek(struct file *file, loff_t offset, int whence)
883 * whence == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate
884 * the cached file length
886 if (whence != SEEK_SET && whence != SEEK_CUR) {
888 struct inode *inode = file_inode(file);
891 * We need to be sure that all dirty pages are written and the
892 * server has the newest file length.
894 if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping &&
895 inode->i_mapping->nrpages != 0) {
896 rc = filemap_fdatawait(inode->i_mapping);
898 mapping_set_error(inode->i_mapping, rc);
903 * Some applications poll for the file length in this strange
904 * way so we must seek to end on non-oplocked files by
905 * setting the revalidate time to zero.
907 CIFS_I(inode)->time = 0;
909 rc = cifs_revalidate_file_attr(file);
913 return generic_file_llseek(file, offset, whence);
917 cifs_setlease(struct file *file, long arg, struct file_lock **lease, void **priv)
920 * Note that this is called by vfs setlease with i_lock held to
921 * protect *lease from going away.
923 struct inode *inode = file_inode(file);
924 struct cifsFileInfo *cfile = file->private_data;
926 if (!(S_ISREG(inode->i_mode)))
929 /* Check if file is oplocked if this is request for new lease */
930 if (arg == F_UNLCK ||
931 ((arg == F_RDLCK) && CIFS_CACHE_READ(CIFS_I(inode))) ||
932 ((arg == F_WRLCK) && CIFS_CACHE_WRITE(CIFS_I(inode))))
933 return generic_setlease(file, arg, lease, priv);
934 else if (tlink_tcon(cfile->tlink)->local_lease &&
935 !CIFS_CACHE_READ(CIFS_I(inode)))
937 * If the server claims to support oplock on this file, then we
938 * still need to check oplock even if the local_lease mount
939 * option is set, but there are servers which do not support
940 * oplock for which this mount option may be useful if the user
941 * knows that the file won't be changed on the server by anyone
944 return generic_setlease(file, arg, lease, priv);
949 struct file_system_type cifs_fs_type = {
950 .owner = THIS_MODULE,
952 .mount = cifs_do_mount,
953 .kill_sb = cifs_kill_sb,
956 MODULE_ALIAS_FS("cifs");
958 static struct file_system_type smb3_fs_type = {
959 .owner = THIS_MODULE,
961 .mount = smb3_do_mount,
962 .kill_sb = cifs_kill_sb,
965 MODULE_ALIAS_FS("smb3");
966 MODULE_ALIAS("smb3");
968 const struct inode_operations cifs_dir_inode_ops = {
969 .create = cifs_create,
970 .atomic_open = cifs_atomic_open,
971 .lookup = cifs_lookup,
972 .getattr = cifs_getattr,
973 .unlink = cifs_unlink,
974 .link = cifs_hardlink,
977 .rename = cifs_rename2,
978 .permission = cifs_permission,
979 .setattr = cifs_setattr,
980 .symlink = cifs_symlink,
982 .listxattr = cifs_listxattr,
985 const struct inode_operations cifs_file_inode_ops = {
986 .setattr = cifs_setattr,
987 .getattr = cifs_getattr,
988 .permission = cifs_permission,
989 .listxattr = cifs_listxattr,
992 const struct inode_operations cifs_symlink_inode_ops = {
993 .get_link = cifs_get_link,
994 .permission = cifs_permission,
995 .listxattr = cifs_listxattr,
998 static loff_t cifs_remap_file_range(struct file *src_file, loff_t off,
999 struct file *dst_file, loff_t destoff, loff_t len,
1000 unsigned int remap_flags)
1002 struct inode *src_inode = file_inode(src_file);
1003 struct inode *target_inode = file_inode(dst_file);
1004 struct cifsFileInfo *smb_file_src = src_file->private_data;
1005 struct cifsFileInfo *smb_file_target;
1006 struct cifs_tcon *target_tcon;
1010 if (remap_flags & ~REMAP_FILE_ADVISORY)
1013 cifs_dbg(FYI, "clone range\n");
1017 if (!src_file->private_data || !dst_file->private_data) {
1019 cifs_dbg(VFS, "missing cifsFileInfo on copy range src file\n");
1023 smb_file_target = dst_file->private_data;
1024 target_tcon = tlink_tcon(smb_file_target->tlink);
1027 * Note: cifs case is easier than btrfs since server responsible for
1028 * checks for proper open modes and file type and if it wants
1029 * server could even support copy of range where source = target
1031 lock_two_nondirectories(target_inode, src_inode);
1034 len = src_inode->i_size - off;
1036 cifs_dbg(FYI, "about to flush pages\n");
1037 /* should we flush first and last page first */
1038 truncate_inode_pages_range(&target_inode->i_data, destoff,
1039 PAGE_ALIGN(destoff + len)-1);
1041 if (target_tcon->ses->server->ops->duplicate_extents)
1042 rc = target_tcon->ses->server->ops->duplicate_extents(xid,
1043 smb_file_src, smb_file_target, off, len, destoff);
1047 /* force revalidate of size and timestamps of target file now
1048 that target is updated on the server */
1049 CIFS_I(target_inode)->time = 0;
1050 /* although unlocking in the reverse order from locking is not
1051 strictly necessary here it is a little cleaner to be consistent */
1052 unlock_two_nondirectories(src_inode, target_inode);
1055 return rc < 0 ? rc : len;
1058 ssize_t cifs_file_copychunk_range(unsigned int xid,
1059 struct file *src_file, loff_t off,
1060 struct file *dst_file, loff_t destoff,
1061 size_t len, unsigned int flags)
1063 struct inode *src_inode = file_inode(src_file);
1064 struct inode *target_inode = file_inode(dst_file);
1065 struct cifsFileInfo *smb_file_src;
1066 struct cifsFileInfo *smb_file_target;
1067 struct cifs_tcon *src_tcon;
1068 struct cifs_tcon *target_tcon;
1071 cifs_dbg(FYI, "copychunk range\n");
1073 if (src_inode == target_inode) {
1078 if (!src_file->private_data || !dst_file->private_data) {
1080 cifs_dbg(VFS, "missing cifsFileInfo on copy range src file\n");
1085 smb_file_target = dst_file->private_data;
1086 smb_file_src = src_file->private_data;
1087 src_tcon = tlink_tcon(smb_file_src->tlink);
1088 target_tcon = tlink_tcon(smb_file_target->tlink);
1090 if (src_tcon->ses != target_tcon->ses) {
1091 cifs_dbg(VFS, "source and target of copy not on same server\n");
1096 * Note: cifs case is easier than btrfs since server responsible for
1097 * checks for proper open modes and file type and if it wants
1098 * server could even support copy of range where source = target
1100 lock_two_nondirectories(target_inode, src_inode);
1102 cifs_dbg(FYI, "about to flush pages\n");
1103 /* should we flush first and last page first */
1104 truncate_inode_pages(&target_inode->i_data, 0);
1106 if (target_tcon->ses->server->ops->copychunk_range)
1107 rc = target_tcon->ses->server->ops->copychunk_range(xid,
1108 smb_file_src, smb_file_target, off, len, destoff);
1112 /* force revalidate of size and timestamps of target file now
1113 * that target is updated on the server
1115 CIFS_I(target_inode)->time = 0;
1116 /* although unlocking in the reverse order from locking is not
1117 * strictly necessary here it is a little cleaner to be consistent
1119 unlock_two_nondirectories(src_inode, target_inode);
1126 * Directory operations under CIFS/SMB2/SMB3 are synchronous, so fsync()
1127 * is a dummy operation.
1129 static int cifs_dir_fsync(struct file *file, loff_t start, loff_t end, int datasync)
1131 cifs_dbg(FYI, "Sync directory - name: %pD datasync: 0x%x\n",
1137 static ssize_t cifs_copy_file_range(struct file *src_file, loff_t off,
1138 struct file *dst_file, loff_t destoff,
1139 size_t len, unsigned int flags)
1141 unsigned int xid = get_xid();
1144 rc = cifs_file_copychunk_range(xid, src_file, off, dst_file, destoff,
1150 const struct file_operations cifs_file_ops = {
1151 .read_iter = cifs_loose_read_iter,
1152 .write_iter = cifs_file_write_iter,
1154 .release = cifs_close,
1156 .fsync = cifs_fsync,
1157 .flush = cifs_flush,
1158 .mmap = cifs_file_mmap,
1159 .splice_read = generic_file_splice_read,
1160 .splice_write = iter_file_splice_write,
1161 .llseek = cifs_llseek,
1162 .unlocked_ioctl = cifs_ioctl,
1163 .copy_file_range = cifs_copy_file_range,
1164 .remap_file_range = cifs_remap_file_range,
1165 .setlease = cifs_setlease,
1166 .fallocate = cifs_fallocate,
1169 const struct file_operations cifs_file_strict_ops = {
1170 .read_iter = cifs_strict_readv,
1171 .write_iter = cifs_strict_writev,
1173 .release = cifs_close,
1175 .fsync = cifs_strict_fsync,
1176 .flush = cifs_flush,
1177 .mmap = cifs_file_strict_mmap,
1178 .splice_read = generic_file_splice_read,
1179 .splice_write = iter_file_splice_write,
1180 .llseek = cifs_llseek,
1181 .unlocked_ioctl = cifs_ioctl,
1182 .copy_file_range = cifs_copy_file_range,
1183 .remap_file_range = cifs_remap_file_range,
1184 .setlease = cifs_setlease,
1185 .fallocate = cifs_fallocate,
1188 const struct file_operations cifs_file_direct_ops = {
1189 .read_iter = cifs_direct_readv,
1190 .write_iter = cifs_direct_writev,
1192 .release = cifs_close,
1194 .fsync = cifs_fsync,
1195 .flush = cifs_flush,
1196 .mmap = cifs_file_mmap,
1197 .splice_read = generic_file_splice_read,
1198 .splice_write = iter_file_splice_write,
1199 .unlocked_ioctl = cifs_ioctl,
1200 .copy_file_range = cifs_copy_file_range,
1201 .remap_file_range = cifs_remap_file_range,
1202 .llseek = cifs_llseek,
1203 .setlease = cifs_setlease,
1204 .fallocate = cifs_fallocate,
1207 const struct file_operations cifs_file_nobrl_ops = {
1208 .read_iter = cifs_loose_read_iter,
1209 .write_iter = cifs_file_write_iter,
1211 .release = cifs_close,
1212 .fsync = cifs_fsync,
1213 .flush = cifs_flush,
1214 .mmap = cifs_file_mmap,
1215 .splice_read = generic_file_splice_read,
1216 .splice_write = iter_file_splice_write,
1217 .llseek = cifs_llseek,
1218 .unlocked_ioctl = cifs_ioctl,
1219 .copy_file_range = cifs_copy_file_range,
1220 .remap_file_range = cifs_remap_file_range,
1221 .setlease = cifs_setlease,
1222 .fallocate = cifs_fallocate,
1225 const struct file_operations cifs_file_strict_nobrl_ops = {
1226 .read_iter = cifs_strict_readv,
1227 .write_iter = cifs_strict_writev,
1229 .release = cifs_close,
1230 .fsync = cifs_strict_fsync,
1231 .flush = cifs_flush,
1232 .mmap = cifs_file_strict_mmap,
1233 .splice_read = generic_file_splice_read,
1234 .splice_write = iter_file_splice_write,
1235 .llseek = cifs_llseek,
1236 .unlocked_ioctl = cifs_ioctl,
1237 .copy_file_range = cifs_copy_file_range,
1238 .remap_file_range = cifs_remap_file_range,
1239 .setlease = cifs_setlease,
1240 .fallocate = cifs_fallocate,
1243 const struct file_operations cifs_file_direct_nobrl_ops = {
1244 .read_iter = cifs_direct_readv,
1245 .write_iter = cifs_direct_writev,
1247 .release = cifs_close,
1248 .fsync = cifs_fsync,
1249 .flush = cifs_flush,
1250 .mmap = cifs_file_mmap,
1251 .splice_read = generic_file_splice_read,
1252 .splice_write = iter_file_splice_write,
1253 .unlocked_ioctl = cifs_ioctl,
1254 .copy_file_range = cifs_copy_file_range,
1255 .remap_file_range = cifs_remap_file_range,
1256 .llseek = cifs_llseek,
1257 .setlease = cifs_setlease,
1258 .fallocate = cifs_fallocate,
1261 const struct file_operations cifs_dir_ops = {
1262 .iterate_shared = cifs_readdir,
1263 .release = cifs_closedir,
1264 .read = generic_read_dir,
1265 .unlocked_ioctl = cifs_ioctl,
1266 .copy_file_range = cifs_copy_file_range,
1267 .remap_file_range = cifs_remap_file_range,
1268 .llseek = generic_file_llseek,
1269 .fsync = cifs_dir_fsync,
1273 cifs_init_once(void *inode)
1275 struct cifsInodeInfo *cifsi = inode;
1277 inode_init_once(&cifsi->vfs_inode);
1278 init_rwsem(&cifsi->lock_sem);
1282 cifs_init_inodecache(void)
1284 cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
1285 sizeof(struct cifsInodeInfo),
1286 0, (SLAB_RECLAIM_ACCOUNT|
1287 SLAB_MEM_SPREAD|SLAB_ACCOUNT),
1289 if (cifs_inode_cachep == NULL)
1296 cifs_destroy_inodecache(void)
1299 * Make sure all delayed rcu free inodes are flushed before we
1303 kmem_cache_destroy(cifs_inode_cachep);
1307 cifs_init_request_bufs(void)
1310 * SMB2 maximum header size is bigger than CIFS one - no problems to
1311 * allocate some more bytes for CIFS.
1313 size_t max_hdr_size = MAX_SMB2_HDR_SIZE;
1315 if (CIFSMaxBufSize < 8192) {
1316 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
1317 Unicode path name has to fit in any SMB/CIFS path based frames */
1318 CIFSMaxBufSize = 8192;
1319 } else if (CIFSMaxBufSize > 1024*127) {
1320 CIFSMaxBufSize = 1024 * 127;
1322 CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
1325 cifs_dbg(VFS, "CIFSMaxBufSize %d 0x%x\n",
1326 CIFSMaxBufSize, CIFSMaxBufSize);
1328 cifs_req_cachep = kmem_cache_create_usercopy("cifs_request",
1329 CIFSMaxBufSize + max_hdr_size, 0,
1330 SLAB_HWCACHE_ALIGN, 0,
1331 CIFSMaxBufSize + max_hdr_size,
1333 if (cifs_req_cachep == NULL)
1336 if (cifs_min_rcv < 1)
1338 else if (cifs_min_rcv > 64) {
1340 cifs_dbg(VFS, "cifs_min_rcv set to maximum (64)\n");
1343 cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
1346 if (cifs_req_poolp == NULL) {
1347 kmem_cache_destroy(cifs_req_cachep);
1350 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
1351 almost all handle based requests (but not write response, nor is it
1352 sufficient for path based requests). A smaller size would have
1353 been more efficient (compacting multiple slab items on one 4k page)
1354 for the case in which debug was on, but this larger size allows
1355 more SMBs to use small buffer alloc and is still much more
1356 efficient to alloc 1 per page off the slab compared to 17K (5page)
1357 alloc of large cifs buffers even when page debugging is on */
1358 cifs_sm_req_cachep = kmem_cache_create_usercopy("cifs_small_rq",
1359 MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
1360 0, MAX_CIFS_SMALL_BUFFER_SIZE, NULL);
1361 if (cifs_sm_req_cachep == NULL) {
1362 mempool_destroy(cifs_req_poolp);
1363 kmem_cache_destroy(cifs_req_cachep);
1367 if (cifs_min_small < 2)
1369 else if (cifs_min_small > 256) {
1370 cifs_min_small = 256;
1371 cifs_dbg(FYI, "cifs_min_small set to maximum (256)\n");
1374 cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
1375 cifs_sm_req_cachep);
1377 if (cifs_sm_req_poolp == NULL) {
1378 mempool_destroy(cifs_req_poolp);
1379 kmem_cache_destroy(cifs_req_cachep);
1380 kmem_cache_destroy(cifs_sm_req_cachep);
1388 cifs_destroy_request_bufs(void)
1390 mempool_destroy(cifs_req_poolp);
1391 kmem_cache_destroy(cifs_req_cachep);
1392 mempool_destroy(cifs_sm_req_poolp);
1393 kmem_cache_destroy(cifs_sm_req_cachep);
1397 cifs_init_mids(void)
1399 cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
1400 sizeof(struct mid_q_entry), 0,
1401 SLAB_HWCACHE_ALIGN, NULL);
1402 if (cifs_mid_cachep == NULL)
1405 /* 3 is a reasonable minimum number of simultaneous operations */
1406 cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
1407 if (cifs_mid_poolp == NULL) {
1408 kmem_cache_destroy(cifs_mid_cachep);
1416 cifs_destroy_mids(void)
1418 mempool_destroy(cifs_mid_poolp);
1419 kmem_cache_destroy(cifs_mid_cachep);
1427 INIT_LIST_HEAD(&cifs_tcp_ses_list);
1428 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1429 INIT_LIST_HEAD(&GlobalDnotifyReqList);
1430 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
1431 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1433 * Initialize Global counters
1435 atomic_set(&sesInfoAllocCount, 0);
1436 atomic_set(&tconInfoAllocCount, 0);
1437 atomic_set(&tcpSesAllocCount, 0);
1438 atomic_set(&tcpSesReconnectCount, 0);
1439 atomic_set(&tconInfoReconnectCount, 0);
1441 atomic_set(&bufAllocCount, 0);
1442 atomic_set(&smBufAllocCount, 0);
1443 #ifdef CONFIG_CIFS_STATS2
1444 atomic_set(&totBufAllocCount, 0);
1445 atomic_set(&totSmBufAllocCount, 0);
1446 if (slow_rsp_threshold < 1)
1447 cifs_dbg(FYI, "slow_response_threshold msgs disabled\n");
1448 else if (slow_rsp_threshold > 32767)
1450 "slow response threshold set higher than recommended (0 to 32767)\n");
1451 #endif /* CONFIG_CIFS_STATS2 */
1453 atomic_set(&midCount, 0);
1454 GlobalCurrentXid = 0;
1455 GlobalTotalActiveXid = 0;
1456 GlobalMaxActiveXid = 0;
1457 spin_lock_init(&cifs_tcp_ses_lock);
1458 spin_lock_init(&GlobalMid_Lock);
1460 cifs_lock_secret = get_random_u32();
1462 if (cifs_max_pending < 2) {
1463 cifs_max_pending = 2;
1464 cifs_dbg(FYI, "cifs_max_pending set to min of 2\n");
1465 } else if (cifs_max_pending > CIFS_MAX_REQ) {
1466 cifs_max_pending = CIFS_MAX_REQ;
1467 cifs_dbg(FYI, "cifs_max_pending set to max of %u\n",
1471 cifsiod_wq = alloc_workqueue("cifsiod", WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);
1474 goto out_clean_proc;
1477 cifsoplockd_wq = alloc_workqueue("cifsoplockd",
1478 WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);
1479 if (!cifsoplockd_wq) {
1481 goto out_destroy_cifsiod_wq;
1484 rc = cifs_fscache_register();
1486 goto out_destroy_cifsoplockd_wq;
1488 rc = cifs_init_inodecache();
1490 goto out_unreg_fscache;
1492 rc = cifs_init_mids();
1494 goto out_destroy_inodecache;
1496 rc = cifs_init_request_bufs();
1498 goto out_destroy_mids;
1500 #ifdef CONFIG_CIFS_DFS_UPCALL
1501 rc = dfs_cache_init();
1503 goto out_destroy_request_bufs;
1504 #endif /* CONFIG_CIFS_DFS_UPCALL */
1505 #ifdef CONFIG_CIFS_UPCALL
1506 rc = init_cifs_spnego();
1508 goto out_destroy_dfs_cache;
1509 #endif /* CONFIG_CIFS_UPCALL */
1511 #ifdef CONFIG_CIFS_ACL
1512 rc = init_cifs_idmap();
1514 goto out_register_key_type;
1515 #endif /* CONFIG_CIFS_ACL */
1517 rc = register_filesystem(&cifs_fs_type);
1519 goto out_init_cifs_idmap;
1521 rc = register_filesystem(&smb3_fs_type);
1523 unregister_filesystem(&cifs_fs_type);
1524 goto out_init_cifs_idmap;
1529 out_init_cifs_idmap:
1530 #ifdef CONFIG_CIFS_ACL
1532 out_register_key_type:
1534 #ifdef CONFIG_CIFS_UPCALL
1536 out_destroy_dfs_cache:
1538 #ifdef CONFIG_CIFS_DFS_UPCALL
1539 dfs_cache_destroy();
1540 out_destroy_request_bufs:
1542 cifs_destroy_request_bufs();
1544 cifs_destroy_mids();
1545 out_destroy_inodecache:
1546 cifs_destroy_inodecache();
1548 cifs_fscache_unregister();
1549 out_destroy_cifsoplockd_wq:
1550 destroy_workqueue(cifsoplockd_wq);
1551 out_destroy_cifsiod_wq:
1552 destroy_workqueue(cifsiod_wq);
1561 cifs_dbg(NOISY, "exit_smb3\n");
1562 unregister_filesystem(&cifs_fs_type);
1563 unregister_filesystem(&smb3_fs_type);
1564 cifs_dfs_release_automount_timer();
1565 #ifdef CONFIG_CIFS_ACL
1568 #ifdef CONFIG_CIFS_UPCALL
1571 #ifdef CONFIG_CIFS_DFS_UPCALL
1572 dfs_cache_destroy();
1574 cifs_destroy_request_bufs();
1575 cifs_destroy_mids();
1576 cifs_destroy_inodecache();
1577 cifs_fscache_unregister();
1578 destroy_workqueue(cifsoplockd_wq);
1579 destroy_workqueue(cifsiod_wq);
1583 MODULE_AUTHOR("Steve French");
1584 MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
1586 ("VFS to access SMB3 servers e.g. Samba, Macs, Azure and Windows (and "
1587 "also older servers complying with the SNIA CIFS Specification)");
1588 MODULE_VERSION(CIFS_VERSION);
1589 MODULE_SOFTDEP("pre: arc4");
1590 MODULE_SOFTDEP("pre: des");
1591 MODULE_SOFTDEP("pre: ecb");
1592 MODULE_SOFTDEP("pre: hmac");
1593 MODULE_SOFTDEP("pre: md4");
1594 MODULE_SOFTDEP("pre: md5");
1595 MODULE_SOFTDEP("pre: nls");
1596 MODULE_SOFTDEP("pre: aes");
1597 MODULE_SOFTDEP("pre: cmac");
1598 MODULE_SOFTDEP("pre: sha256");
1599 MODULE_SOFTDEP("pre: sha512");
1600 MODULE_SOFTDEP("pre: aead2");
1601 MODULE_SOFTDEP("pre: ccm");
1602 module_init(init_cifs)
1603 module_exit(exit_cifs)